In 2012, Er Yong told Ran Xi and Zhao Gan'e in his barber shop that he saw a woman who was very similar to the fugitive Zhou Weiping. Based on the clues provided by Er Yong, the two went to Zhou Weiping's house to stay.In 1994, a piece of clothing full of blood appeared in the area. Tian Hao immediately reported that Tian Chang was missing again. Everyone was worried that Tian Chang had encountered the murderer Wang Kun. It was confirmed that the bloody clothing was Tian Chang's school uniform.

The college entrance examination was about to take place. Ran Xi suspected that the blood stains on Ran Dongdong's body were related to the Tian Chang case, so she went to school and asked Ran Dongdong not to go home in the near future. Zhao Gan'e also learned from Tian Chang's school that she had written a letter to Ran Dongdong.At night, Tian Hao found the Ran family and asked Ran Dongdong to hand over Tian Chang. Ran Dongdong was taken to the police station for questioning. Ran Xi wanted to interrogate himself but was rejected by Director Zhu. In the end, Zhao went to school to pick up Ran Dongdong.

During the interrogation, Zhao Gan'e deliberately let Ran Dongdong see Tian Chang's investigation report, hoping that Ran Dongdong would admit that Tian Chang ran away from home and was not killed.In desperation, Ran Dongdong admitted that he had killed Tian Chang in order to buy time for Tian Chang to escape.Ran Xi angrily asked her son why he lied and said Tian Chang was killed by himself, but Ran Dongdong insisted on his own statement. Ran Xi understood that his son was delaying Tian Chang's escape. At this time, Tian Chang had successfully boarded the leaving train.Everyone found only exercise books in the well, but not Tian Chang's body.